recording: bar_groups_and_pie (categorical charts + legend toggle)

[borisbat]

First of the display-tour recordings. bar_groups_and_pie shows the two categorical items side by side: a grouped bar chart (three series clustered into four quarters) and a pie chart (one slice per labelled value). The tour carries one real interaction — a legend toggle on the grouped bars: clicking a series hides it across every group at once (the whole industrial color drops out of all four quarters — distinct from hiding a single line series in multi_series), then a second click restores it.

Voiced and self-verifying with real synthetic input: the toggle must flip the series' shown flag both ways (wait_for_series_shown false → true) and both plots must render, so a no-op toggle or a missing chart aborts at teardown.

Files

• tests/integration/record_bar_groups_and_pie.das — the voiced driver (intro both charts + legend toggle hide/restore on the bars + point at the pie).
• doc/source/tutorials/bar_groups_and_pie.rst — .. video:: bar_groups_and_pie.mp4 + a Walkthrough section describing the across-all-groups legend toggle.
• doc/source/_static/tutorials/bar_groups_and_pie.mp4 — the recording (705 KB, 30.2 s, 778 frames, 0 dropped, Emma voice + −16 dB bed).

Verification

• ok:true, 778 frames, 0 dropped; all gates pass (both plots rendered + industrial shown flips false then true).
• Eyeballed: the green series vanishes from all four groups (~1.8 s, legend entry greyed), then returns; pie tour points at the slice.

The headless guard is the existing test_bar_groups_and_pie.das.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds the first “display-tour” recording for the bar_groups_and_pie tutorial, including a self-verifying legend-toggle interaction on grouped bars, and updates the tutorial docs to embed and describe the walkthrough video.

Changes:

• Add a new integration recording driver (record_bar_groups_and_pie.das) that narrates the two categorical charts and validates legend toggle hide/restore via wait_for_series_shown.
• Document the new walkthrough in the tutorial RST and embed the corresponding video.
• Add the recorded tutorial video asset (bar_groups_and_pie.mp4) under the docs static tutorials directory.

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/integration/record_bar_groups_and_pie.das	New voiced recording driver that exercises and verifies grouped-bar legend toggling plus pie rendering.
doc/source/tutorials/bar_groups_and_pie.rst	Adds a “Walkthrough” section embedding the video and describing the cross-group legend toggle behavior.
doc/source/_static/tutorials/bar_groups_and_pie.mp4	Tutorial walkthrough video asset referenced by the new docs section.

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